Next-token-prediction cannot do calculations. That is fundamental.

It can produce outputs that resemble calculations.

It can prompt an agent to input some numbers into a separate program that will do calculations for it and then return them as a prompt.

Neither of these are calculations.

After dismissing it for a long time, I have come around to the philosophical zombie argument. I do not believe that LLMs are conscious, but I also no longer believe that consciousness is a prerequisite for intelligence. I think at this point it is hard to deny that LLMs do not possess some form of intelligence (although not necessarily human-like). I think P-zombies is a fitting description.